Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronic Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

How to model a slot antenna in HFSS

Status
Not open for further replies.

usef_vahabzadeh

Newbie level 6
Joined
Jul 31, 2012
Messages
12
Helped
1
Reputation
2
Reaction score
1
Trophy points
1,283
Activity points
1,379
hi dear all
i want to model a waveguide filled with dielectric with one slot on broad wall of the waveguide (slot antenna) in hfss which supports just TE10 but i don't know how to fill waveguide with dielectric and how to simulate end of the waveguide. when i place pec at the end of waveguide I have reflections.i will send you my hfss file. please help me how to solve this problems. thanks you
 

DeboraHarry

Full Member level 5
Joined
Dec 3, 2011
Messages
275
Helped
48
Reputation
94
Reaction score
43
Trophy points
1,308
Location
UK
Activity points
3,905
Re: slot antenna in hfss

The dielectric will be a box made of whatever material you want. You will want a waveport at each end if you don't want reflections. You will need a radiation boundary that is at least lamda/4 away from the outer edges of the waveguide.

There's an example in the HFSS manual of a horn antenna made from waveguide which is flared at the end. If you follow that, but put the waveports on each end, not just one, you should get something like you want.

Deborah
 

Shehata

Member level 3
Joined
Jan 22, 2010
Messages
63
Helped
12
Reputation
24
Reaction score
11
Trophy points
1,298
Location
Waterloo, Ontario, Canada
Activity points
1,619
Re: slot antenna in hfss

Hi

I suggest you start with the waveguide alone (2 port problem) and verify the simulations with the theory. Then add the antenna. If you have any problem plz send the file
 

usef_vahabzadeh

Newbie level 6
Joined
Jul 31, 2012
Messages
12
Helped
1
Reputation
2
Reaction score
1
Trophy points
1,283
Activity points
1,379
Re: slot antenna in hfss

hello dear
thanks for your answer. here I have designed a slot on broad face of the waveguide using HFSS. I have analyzed the problem parametric where distance from center-line changes from L=0.02to 0.4mm. I want to get '-2s11/(1+s11)' in the output but just a constant line appears in output. pls help me what is the problem? I have uploaded my HFSS design here and I should get a similar answer g(x) in the attached image.
 

Attachments


Status
Not open for further replies.
Toggle Sidebar

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top